/*
 * Copyright 2016-2017 Uber Technologies, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/** @file vec2d.c
 * @brief   2D floating point vector functions.
 */

#include "QueryEngine/ExtensionFunctions/h3lib/include/vec2d.h"

// #include <math.h>
// #include <stdio.h>

/**
 * Calculates the magnitude of a 2D cartesian vector.
 * @param v The 2D cartesian vector.
 * @return The magnitude of the vector.
 */
EXTENSION_INLINE double _v2dMag(const Vec2d(v)) {
  return sqrt(v[X_INDEX] * v[X_INDEX] + v[Y_INDEX] * v[Y_INDEX]);
}

// /**
//  * Finds the intersection between two lines. Assumes that the lines intersect
//  * and that the intersection is not at an endpoint of either line.
//  * @param p0 The first endpoint of the first line.
//  * @param p1 The second endpoint of the first line.
//  * @param p2 The first endpoint of the second line.
//  * @param p3 The second endpoint of the second line.
//  * @param inter The intersection point.
//  */
// void _v2dIntersect(const Vec2d* p0, const Vec2d* p1, const Vec2d* p2,
//                    const Vec2d* p3, Vec2d* inter) {
//     Vec2d s1, s2;
//     s1.x = p1->x - p0->x;
//     s1.y = p1->y - p0->y;
//     s2.x = p3->x - p2->x;
//     s2.y = p3->y - p2->y;

//     float t;
//     t = (s2.x * (p0->y - p2->y) - s2.y * (p0->x - p2->x)) /
//         (-s2.x * s1.y + s1.x * s2.y);

//     inter->x = p0->x + (t * s1.x);
//     inter->y = p0->y + (t * s1.y);
// }

// /**
//  * Whether two 2D vectors are equal. Does not consider possible false
//  * negatives due to floating-point errors.
//  * @param v1 First vector to compare
//  * @param v2 Second vector to compare
//  * @return Whether the vectors are equal
//  */
// bool _v2dEquals(const Vec2d* v1, const Vec2d* v2) {
//     return v1->x == v2->x && v1->y == v2->y;
// }
